Nut-lock.



NNNNNNN APPLICATION IILEDAUG. 2 66666 2.

UNITED STATES PATENT ()FFIGE-Y.

Patented July 28, 1903.

JOHN EMANUEL LENHOLT, OF CROMWELL, CONNECTICUT, ASSIGNOR OF IONE-HALF TO A. N. PIERSON, OF CROMWELL, CONNECTICUT.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 734,579, dated July 28, 1903.

Application filed August 26,1902. Serial No. 121,114. (No model.)

To all whom it may concern: 7

Be it known that I,.IOHN EMANUEL LEN- HOLT, a citizen of the United States, residing at Cromwell, in the county of Middlesex and State of Connecticut, have invented a new and useful Nut-Lock, of which the following is a specification.

This invention relates to nut-locks; and the object thereof is to provide simple means which will eifectively fasten a nut to a bolt and also to the surface against which the nut is clamped.

The invention is fully illustrated in the accompanying drawings, wherein Figure 1 isya sectional view through a railroad-rail and fish-plates, showing the usual bolt and the nut thereon locked by the improved means. Fig. 2 is also a sectional view, the nut being shown in section. Fig. 3 is a plan view of'the inner face of the nut. Fig. 4: is a perspective view of the locking-washer.

Similar reference-numerals indicate corresponding parts in all the figures of the drawings.

The nut is designated by the referencenumeral and may be of any desired shape, having the'usual screw-threaded opening 11 therethrough designed to receive the threaded end of an ordinary bolt, (shown atl2.) This nut is providedin its inner 'face with an annular seat or groove 13, that is spaced from and concentric with the opening 11, forming therebetween a compressible wall or flange 14, that preferably tapers toward its outerend. A circular locking-washer 15 is arranged. to be seated in the groove 13 and comprises a split ring the ends of which are arranged out of alinement, said ring being formed of an angular bar that is twisted to provide a plurality of spiral cuttingedges 16. ter of this ring is such that when itis. placed in the seat or groove 13 its inner and outer edges will engage the opposite walls of the groove, and thus when the nut is threaded home upon the bolt the washer being forced into the groove will in turn compress the wall 14 tightly against the threads of said bolt, and in this manner the nut will be locked against retrograde movement. At the same time the spiral edges 16 of the washer will bite The diame into the walls of the groove and the surface against which the washerrests, thus making the look more secure.

It will be apparent that a lock constructed in accordance with the illustration and description will securely hold a nut upon a bolt, so that it will not become accidentally displaced by shocks and jars. It is therefore especially useful on railways, though it will be evident that it can be employed for Various other purposes.

From the foregoing it is thought that the construotion,operation,and many advantages of the herein-described invention will be apparent to those skilledin the art without further description, and it-willbe understood that various changes in the size, shape, proportion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention. r g Having thus described. my invention, What I claim as new, and desire to secure by Letters Patent, is-- The combination with a nut having an opening, the walls of which are threaded, and an annular seat formed in its inner face, said seat being concentric with and spaced from the opening and forming therebetween a compressible flange, of a locking-washer fitted in the seat and comprising a split ring the ends of which are located out of alinement, said ring being formed of a twisted angular bar that is thicker than the distance between the walls of the seat and therefore is arranged to force the compressible flange into engagement With the bolt passing through the opening in the nut, the edges of the washer, furthermore, biting into the walls of the seat and the surf'ace'against which the washer rests, there-f my own I have hereto affixed my'signaturefin the presence of two Witnesses.

JOHN EMANUEL LENHOLT.

Witnesses A. F. ()BERG,

ALF SANDSTRAN. 

